<!DOCTYPE html>
<html>
<head>
    <meta charset="UTF-8">
    <!-- import CSS -->
    <link rel="stylesheet" href="https://cdn.staticfile.org/element-ui/2.15.9/theme-chalk/index.css">

    <style>
        .el-carousel__item h3 {
            color: #475669;
            font-size: 14px;
            opacity: 0.75;
            line-height: 200px;
            margin: 0;
        }

        .el-carousel__item:nth-child(2n) {
            background-color: #99a9bf;
            background-image: url("img.png");
        }

        .el-carousel__item:nth-child(2n+1) {
            background-color: #d3dce6;
            background-image: url("img_1.png");
        }
    </style>
</head>
<body>
<div id="app">
    <template>
        <el-carousel :interval="4000" type="card" height="200px">
            <el-carousel-item v-for="item in 6" :key="item">
                <h3 class="medium">{{ item }}</h3>
            </el-carousel-item>
        </el-carousel>
    </template>
</div>
</body>
<!-- import Vue before Element -->
<script src="https://cdn.staticfile.org/vue/2.6.14/vue.min.js"></script>
<!-- import JavaScript -->
<script src="https://cdn.staticfile.org/element-ui/2.15.9/index.min.js"></script>
<script>
    let v = new Vue({
        el: '#app',
        data: function() {
            return {

            }
        },
        methods:{

        }
    })
</script>
</html>